Writing BLE Commands on a Loop Doesn't Get All Responses - Swift

I am working on a project (Swift) to connect to OBDII Devices. Currently my issue is with a BLE device.

I am able to send commands (write) successfully, when I send them individually:

private func sendBT_Command(theCommand: String) {
    
    if let myPeripheral = myPeripheral,
       let writeCharacteristic = writeCharacteristic {

        let completeCommand  = "\(theCommand)\r\n"
        let commandData = Data(completeCommand.utf8)

        myPeripheral.writeValue(commandData, for: writeCharacteristic, type: .withResponse)
        
    } else {
        
        print("NO CONNECTION")
        
    }
    
}

The commands I send individually are :

ATZ, ATST32, ATH1, ATE0 .... and others.

In the didUpdateValues delegate...

func peripheral(_ peripheral: CBPeripheral, didUpdateValueFor characteristic: CBCharacteristic, error: Error?) {
    
    
    if let value = characteristic.value {
        
        let resultString = String(decoding: value, as: UTF8.self)
        
        if hasTermination(aResponse: resultString) {
            receivedResponse = true
        }
        
        let finalString = resultString.replacingOccurrences(of: "\n", with: "")
            .replacingOccurrences(of: "\r", with: "")
            .replacingOccurrences(of: ">", with: "")

        if !finalString.isEmpty {
            print("Data received : \(finalString)")
        }
        
    }
}

I receive the data fine, as long as I send commands one by one (I'm using a table view right now)

The Issue!!!

If I create a loop to send the commands, like following, multiple commands are sent but only one response is received. I can even see my device blinking sending the data.

    while runLoop == true {
        
        // Even If I make it sleep for a second, doesn't wok
        // Thread.sleep(forTimeInterval: 1.0)
        sendBT_Command(theCommand: "0105")
        
    }

Any idea why I can send and receive the responses when using LOOP?

Thanks in advance!